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Acta Seismologica Sinica

, Volume 13, Issue 5, pp 525–535 | Cite as

Theoretical analysis of the spatio-temporal evolution of the bulk-strain field based on a rheologic inclusion model

  • Song Zhi-ping 
  • Yin Xiang-chu 
  • Mei Shi-rong 
Article

Abstract

Based on the theoretical expression of the three-dimension rheologic inclusion model, we analyze in detail the spatio-temporal changes on the ground of the bulk-strain produced by a spherical rheologic inclusion in a semi-infinite rheologic medium. The results show that the spatio-temporal change of bulk-strain produced by the hard inclusion has three stages of different characteristics, which are similar to most of those geodetic deformation curves, but those by a soft inclusion do not. The α-stage is a long stage in which the precursors in both the near source region and the far field develop from the focal region to the periphery. The β-stage indicates a very rapid propagation of the precursors, so that they almost appear everywhere. During the γ-stage, the precursors in the far-field converge from the periphery, and the precursors in the near source region develop outwards. The theoretical results have been used to explain tentatively the stage characteristics of the spatio-temporal change of earthquake precursors.

Key words

elastic inclusion theory rheologic inclusion model strong body earthquake generating model earthquake precursor 

CLC number

P315.72+

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Copyright information

© Acta Seismologica Sinica 2000

Authors and Affiliations

  • Song Zhi-ping 
    • 1
  • Yin Xiang-chu 
    • 2
  • Mei Shi-rong 
    • 2
  1. 1.Beijing Seismological BureauBeijingChina
  2. 2.Center for Analysis and PredictionChina Seismological BureauBeijingChina

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